No Internet After Installing Internet Security 2009

The night before last I received a message to update my Norton Internet Security to 2009.  The download and install seemed to work fine.  The next day I tried to connect to the internet and got a window saying I did not have connectivity.  I called tech support for my ISP and we walked through possible issues.  Since I have wireless on another computer, I was able to confirm cable modem and router are okay.  My network card is working according to Windows diagnositics.  However, I have no IP address showing up despite clicking on "repair".  I also tried shutting down and rebooting computer, modem and router.  Strangely enough I had a message pop up on my other computer with the wireless connection saying I had a IP address conflict.  I never had this message appear before I loaded the IS 2009.  I would greatly appreciate ideas on how to fix.  I called Symantec Tech support and waited over an hour but then had to bail. 

Thanks.